Italian firemen work on the Norman Atlantic ferry after it was towed into the port of Brindisi, southern Italy, Saturday, Jan. 3, 2015. Wearing gas masks against the smoke, Italian firefighters and investigators boarded the charred Norman Atlantic ferry on Friday and retrieved a data recorder they hope will help them discover what caused a deadly blaze. Some parts of the ferry are still burning making difficoult the search for any more bodies in the maritime disaster that has already killed 11 people. (AP Photo/Antonio Calanni) (The Associated Press)

Light streams through a window of the Norman Atlantic ferry as it is being towed into the port of Brindisi, Italy, Friday, Jan. 2, 2015. The blaze that broke out Sunday and torched the ferry has killed at least 11 people and authorities prepared to search it for possible more dead. Italy says 477 pe...